21202310191 has 2 divisors, whose sum is σ = 21202310192. Its totient is φ = 21202310190.

The previous prime is 21202310161. The next prime is 21202310219. The reversal of 21202310191 is 19101320212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21202310191 - 2¹³ = 21202301999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21202310161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601155095 + 10601155096.

It is an arithmetic number, because the mean of its divisors is an integer number (10601155096).

Almost surely, 2^21202310191 is an apocalyptic number.

21202310191 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202310191 is an equidigital number, since it uses as much as digits as its factorization.

21202310191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 21202310191 in words is "twenty-one billion, two hundred two million, three hundred ten thousand, one hundred ninety-one".